Package net.naijatek.myalumni.util.taglib

Source Code of net.naijatek.myalumni.util.taglib.DisplayRSSTag

/*
* ====================================================================
* Copyright (C) 1997-2008 by Naijatek.com
*
* All copyright notices regarding MyAlumni MUST remain
* intact in the scripts and in the outputted HTML.
* The "powered by" text/logo with a link back to
* http://www.naijatek.com in
* the footer of the pages MUST remain visible when the pages
* are viewed on the internet or intranet.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
*
* Support can be obtained from support forums at:
* http://www.naijatek.com/myalumni/forum
*
* Correspondence and Marketing Questions can be sent to:
* info at naijatek com
*
* <p>Title: MyAlumni </p>
* <p>Description: This system helps keep alive the line of communications between alumni/alumnus</p>
* <p>Copyright: Copyright (c) 1997-2008</p>
* <p>Company: Naijatek Solutions (http://www.naijatek.com)</p>
* @author Folashade Adeyosoye (shardayyy@naijatek.com)
* @version 1.0
*/
package net.naijatek.myalumni.util.taglib;


import java.util.List;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.jsp.JspException;
import javax.servlet.jsp.JspTagException;
import javax.servlet.jsp.tagext.BodyContent;
import javax.servlet.jsp.tagext.BodyTagSupport;


import net.naijatek.myalumni.modules.common.domain.SystemConfigVO;
import net.naijatek.myalumni.modules.common.service.ISystemConfigService;
import net.naijatek.myalumni.util.BaseConstants;
import net.naijatek.myalumni.util.utilities.AppProp;

import com.sun.syndication.feed.synd.SyndFeed;
import com.sun.syndication.io.SyndFeedInput;
import com.sun.syndication.io.XmlReader;

import java.net.URL;


import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.web.context.WebApplicationContext;
import org.springframework.web.context.support.WebApplicationContextUtils;



public class DisplayRSSTag extends BodyTagSupport {

/**
   * LOGGER
   */
  private static Log logger = LogFactory.getLog(DisplayRSSTag.class);
  private ISystemConfigService sysConfigService;
  private HttpServletRequest request = null;
  private String maxNumberToDisplay = null;
 
 
  /**
   * Includes the body of the tag if the page attribute equals the value set
   * in the 'match' attribute.
   *
   * @return SKIP_BODY if equalsAttribute body content does not equal the
   *   value of the match attribute, EVAL_BODY_include if it does
   * @throws JspException
   */
  @Override
public final int doStartTag() throws JspException
    {
        request = (HttpServletRequest) pageContext.getRequest();
        WebApplicationContext wac = WebApplicationContextUtils.getWebApplicationContext(pageContext.getServletContext());
      sysConfigService = (ISystemConfigService) wac.getBean(BaseConstants.SERVICE_SYSTEM_CONFIG);
        return EVAL_BODY_BUFFERED;
    }

  /**
   * Process the end of this tag.
   *
   * @throws JspException if a JSP exception has occurred
   * @return int
   */
  @Override
public final int doEndTag() throws JspException {

     request = (HttpServletRequest) pageContext.getRequest();
       StringBuffer sb = new StringBuffer();
       AppProp ap = AppProp.getInstance();


           SystemConfigVO feed = sysConfigService.getRssFeedSource();
           int limit ;
           try{
             limit = Integer.parseInt(getMaxNumberToDisplay());
           }
           catch(NumberFormatException nfe){
             limit = 5;
           }

          
           try {       
               // Next, we read the fed input.
               URL feedUrl = new URL(feed.getRssUrl());
               //System.out.println(feedUrl);
               SyndFeedInput input = new SyndFeedInput();
             
               XmlReader reader = new XmlReader(feedUrl);
               SyndFeed feeder = input.build(reader);
                        
              
               List feederEntries = feeder.getEntries();
               int end = feederEntries.size();
               end = (end < limit) ? end : limit;
             
               List selectedNewsEntries = feederEntries.subList(0, end);
              
               // We then set this selected news in our feed source.
               request.setAttribute("readNews", feederEntries);
               request.setAttribute("rssHeader", feed.getRssHeader());
           }
           catch (Exception e) {
               sb.append(ap.getValue("core.errorcode.00707"));//Problem encountered while retrieving rss feeds
               System.out.println(e.getMessage());
           }
          


      return EVAL_PAGE;
    }


    @Override
  public int doAfterBody() throws JspException, JspTagException {
      //System.out.println("doAfterBody()");
      BodyContent bc = getBodyContent();
      //setTableWidth(bc.getString());  // get body string
      bc.clearBody();      // clean up
      return SKIP_BODY;
    }


    /**
     * Release any acquired resources.
     */
    @Override
  public void release() {
        //System.out.println("release()");
        super.release();
    }

  public String getMaxNumberToDisplay() {
    return maxNumberToDisplay;
  }

  public void setMaxNumberToDisplay(String maxNumberToDisplay) {
    this.maxNumberToDisplay = maxNumberToDisplay;
  }


  }
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